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# AudioTrack.OnCodecFormatChangedListener

`public static interface AudioTrack.OnCodecFormatChangedListener`
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android.media.AudioTrack.OnCodecFormatChangedListener

Interface definition for a listener for codec format changes.

## Summary

### Public methods
`abstract void` | `onCodecFormatChanged(AudioTrack audioTrack, AudioMetadataReadMap info)` Called when the compressed codec format changes.

## Public methods

### onCodecFormatChanged

    public abstract void onCodecFormatChanged (AudioTrack audioTrack,
                    AudioMetadataReadMap info)

Called when the compressed codec format changes.

Parameters
`audioTrack` | `AudioTrack`: is the `AudioTrack` instance associated with the codec. This value cannot be `null`.
`info` | `AudioMetadataReadMap`: is a `AudioMetadataReadMap` of values which contains decoded format changes reported by the codec. Not all hardware codecs indicate codec format changes. Acceptable keys are taken from `AudioMetadata.Format.KEY_*` range, with the associated value type. This value may be `null`.

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